de la a la d.
Punctaj maxim!
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[tex]\it a)\ x+\sqrt2=\sqrt8 \Rightarrow x+\sqrt2=\sqrt{4\cdot2} \Rightarrow x+\sqrt2=2\sqrt2 \Rightarrow x=2\sqrt2-\sqrt2 =\sqrt2\\ \\ b)\ 4,5x+9=13,5|_{-9} \Rightarrow 4,5x=4,5|_{:4,5} \Rightarrow x=1\\ \\ c)\ \sqrt3x-2=1 \Rightarrow \sqrt3x=1+2 \Rightarrow \sqrt3x=3 \Rightarrow \sqrt3x=\sqrt3\cdot\sqrt3|_{:\sqrt3} \Rightarrow x=\sqrt3\\ \\ d) -3\dfrac{1}{2}x-1,5=(\sqrt2)^2\Rightarrow-3,5x-1,5=2|_{+1,5}\Rightarrow -3,5x=3,5\Rightarrow x=-1[/tex]
x + √2 = √8
x + √2 = √2²×2
x + √2 = 2√2
x = 2√2 - √2
x = √2
4,5x + 9 = 13,5
4,5x = 13,5 - 9
4,5x = 4,5
x = 1
√3·x - 2 = 1
√3·x = 1 + 2
√3·x = 3
x = 3/√3
x = 3√3/3
x = √3
- 3 1/2·x - 1,5 = (√2)²
(-3×2+1)x/2 - 1,5 = 2
(-6+1)x/2 = 2 + 1,5
- 7x/2 = 3,5
- 7x = 7
x = - 1